Absolute Calibration: ± 10% traceable to National Institute of Science and Technology (NIST). The LI-191 is calibrated via transfer calibration using a reference LI-190R Quantum Sensor. Transfer error is ± 5% (included in the ± 10%)
Sensitivity: Typically 7 μA per 1,000 μmol s-1 m-2
Linearity: Maximum deviation of 1% up to 10,000 μmol s-1 m-2
Response Time: 10 μs
Temperature Dependence: ± 0.15% per °C maximum
Cosine Correction: Acrylic diffuser
Azimuth: < ± 2% error over 360° at 45° elevation
Operating Temperature Range: −40 °C to 65 °C
Relative Humidity Range: 0% to 95% RH, Non-Condensing
Sensitivity Variation over Length: ± 7% maximum using a 2.54 cm (1”) wide beam from an incandescent light source.
Sensing Area: 1 m × 12.7 mm (39.4” × 0.50”)
Detector: High stability silicon photovoltaic detector (blue enhanced)
Sensor Housing: Weatherproof anodized aluminum housing with acrylic diffuser and stainless steel hardware.
Size: 121.3 L × 2.54 W × 2.54 cm D (47.7” × 1.0” × 1.0”)
Weight: 1.4 kg (3.0 lbs.)
Cable Length: 3.1 m (10.0 ft.)